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arxiv: nucl-ex/0701036 · v3 · pith:TAPYOGCRnew · submitted 2007-01-22 · ⚛️ nucl-ex

Cross Sections for the γ p to K^(*0)Sigma^+ Reaction at E_γ = 1.7 - 3.0 GeV

classification ⚛️ nucl-ex
keywords datacrossgammamodelsectionsangleskstarrange
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Differential cross sections for the reaction $\gamma p \to K^{*0} \Sigma^+$ are presented at nine bins in photon energy in the range from 1.7 to 3.0 GeV. The \kstar was detected by its decay products, $K^+\pi^-$, in the CLAS detector at Jefferson Lab. These data are the first \kstar photoproduction cross sections ever published over a broad range of angles. Comparison with a theoretical model based on the vector and tensor $K^*$-quark couplings shows good agreement with the data in general, after adjusting the model's two parameters in a fit to our data. Disagreement between the data at forward angles and the global angle-energy fit to the model suggests that the role of scalar $\kappa$ meson exchange in $t$-channel diagrams should be investigated.

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